:root {
            --o6ip-primary: #bf0000;
            --o6ip-primary-dark: #990000;
            --o6ip-secondary: #2c3e50;
            --o6ip-bg-light: #f8f9fa;
            --o6ip-text-main: #333333;
            --o6ip-text-muted: #666666;
            --o6ip-white: #ffffff;
            --o6ip-sidebar-width: 280px;
            --o6ip-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--o6ip-text-main);
            background-color: var(--o6ip-bg-light);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 布局结构 */
        .o6ip-app-container {
            display: flex;
            flex-wrap: wrap;
            min-height: 100vh;
        }

        /* 侧边导航 */
        .o6ip-sidebar {
            width: var(--o6ip-sidebar-width);
            background: var(--o6ip-white);
            border-right: 1px solid #eee;
            position: fixed;
            height: 100vh;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: var(--o6ip-transition);
        }

        .o6ip-logo-wrapper {
            padding: 32px;
            border-bottom: 1px solid #f0f0f0;
        }

        .o6ip-logo {
            width: 100%;
            max-width: 180px;
        }

        .o6ip-logo img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .o6ip-nav-menu {
            flex: 1;
            padding: 24px 0;
            overflow-y: auto;
        }

        .o6ip-nav-item {
            display: block;
            padding: 12px 32px;
            text-decoration: none;
            color: var(--o6ip-secondary);
            font-weight: 500;
            transition: var(--o6ip-transition);
            border-left: 4px solid transparent;
            margin-bottom: 4px;
        }

        .o6ip-nav-item:hover {
            background: #fff5f5;
            color: var(--o6ip-primary);
        }

        .o6ip-nav-item.o6ip-active {
            background: #fff0f0;
            color: var(--o6ip-primary);
            border-left-color: var(--o6ip-primary);
        }

        /* 主内容区 */
        .o6ip-main-content {
            flex: 1;
            margin-left: var(--o6ip-sidebar-width);
            min-width: 0;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }

        .o6ip-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 48px 32px;
        }

        /* Hero 区块 */
        .o6ip-hero {
            margin-bottom: 64px;
            position: relative;
        }

        .o6ip-hero-title {
            font-size: clamp(2rem, 4vw + 0.5rem, 3.5rem);
            font-weight: 800;
            line-height: 1.1;
            color: var(--o6ip-secondary);
            margin-bottom: 24px;
            word-break: break-word;
        }

        .o6ip-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--o6ip-text-muted);
            max-width: 800px;
            margin-bottom: 32px;
        }

        /* 下载网格 - 非对称设计 */
        .o6ip-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-bottom: 64px;
        }

        .o6ip-download-card {
            background: var(--o6ip-white);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            transition: var(--o6ip-transition);
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .o6ip-download-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .o6ip-card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .o6ip-card-body {
            padding: 32px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .o6ip-os-tag {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--o6ip-primary);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .o6ip-card-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--o6ip-secondary);
        }

        .o6ip-btn-download {
            margin-top: auto;
            display: inline-block;
            background: var(--o6ip-primary);
            color: var(--o6ip-white);
            padding: 14px 28px;
            border-radius: 8px;
            text-decoration: none;
            text-align: center;
            font-weight: 600;
            transition: var(--o6ip-transition);
        }

        .o6ip-btn-download:hover {
            background: var(--o6ip-primary-dark);
            box-shadow: 0 4px 12px rgba(191, 0, 0, 0.3);
        }

        /* Server 特殊入口 */
        .o6ip-server-entry {
            background: var(--o6ip-secondary);
            border-radius: 16px;
            padding: 48px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 40px;
            color: var(--o6ip-white);
            margin-bottom: 64px;
        }

        .o6ip-server-entry img {
            width: 120px;
            height: 120px;
            border-radius: 12px;
            object-fit: cover;
        }

        .o6ip-server-info {
            flex: 1;
            min-width: 280px;
        }

        .o6ip-server-info h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

        .o6ip-btn-outline {
            display: inline-block;
            border: 2px solid var(--o6ip-white);
            color: var(--o6ip-white);
            padding: 12px 24px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--o6ip-transition);
        }

        .o6ip-btn-outline:hover {
            background: var(--o6ip-white);
            color: var(--o6ip-secondary);
        }

        /* 效率特性 - 非对称排列 */
        .o6ip-features-section {
            padding: 64px 0;
        }

        .o6ip-feature-row {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-bottom: 48px;
        }

        .o6ip-feature-item {
            flex: 1;
            min-width: 300px;
            background: var(--o6ip-white);
            padding: 32px;
            border-radius: 12px;
            border-left: 6px solid var(--o6ip-primary);
        }

        .o6ip-feature-name {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--o6ip-secondary);
            margin-bottom: 12px;
        }

        .o6ip-feature-desc {
            color: var(--o6ip-text-muted);
            margin-bottom: 16px;
        }

        .o6ip-feature-impact {
            display: inline-block;
            background: #fff0f0;
            color: var(--o6ip-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* 部署场景 */
        .o6ip-scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .o6ip-scenario-card {
            padding: 24px;
            background: rgba(255,255,255,0.5);
            border: 1px dashed #ccc;
            border-radius: 12px;
        }

        .o6ip-scenario-card h4 {
            margin-bottom: 12px;
            color: var(--o6ip-secondary);
        }

        /* 页脚 */
        .o6ip-footer {
            padding: 64px 32px;
            background: var(--o6ip-secondary);
            color: rgba(255,255,255,0.7);
            text-align: center;
        }

        .o6ip-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--o6ip-white);
            margin-bottom: 16px;
        }

        .o6ip-footer-links {
            margin-bottom: 24px;
        }

        .o6ip-footer-links a {
            color: rgba(255,255,255,0.5);
            text-decoration: none;
            margin: 0 12px;
            transition: var(--o6ip-transition);
        }

        .o6ip-footer-links a:hover {
            color: var(--o6ip-white);
        }

        /* 移动端适配 */
        .o6ip-mobile-header {
            display: none;
            background: var(--o6ip-white);
            padding: 16px;
            position: sticky;
            top: 0;
            z-index: 1001;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            justify-content: space-between;
            align-items: center;
        }

        @media (max-width: 992px) {
            .o6ip-sidebar {
                transform: translateX(-100%);
            }
            .o6ip-sidebar.o6ip-active {
                transform: translateX(0);
            }
            .o6ip-main-content {
                margin-left: 0;
            }
            .o6ip-mobile-header {
                display: flex;
            }
            .o6ip-menu-toggle {
                font-size: 1.5rem;
                cursor: pointer;
                background: none;
                border: none;
            }
        }

        @media (max-width: 768px) {
            .o6ip-container {
                padding: 32px 20px;
            }
            .o6ip-download-grid {
                grid-template-columns: 1fr;
            }
            .o6ip-hero-title {
                font-size: 2.2rem;
            }
        }